net: vxlan: prevent NULL deref in vxlan_xmit_one

{
  "id": "7585c34d183aa7e4726acbf65c89e8fe94b36979818d4675e981173092f5fd81",
  "url": "https://osv.dev/vulnerability/CVE-2025-68353",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net: vxlan: prevent NULL deref in vxlan_xmit_one",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: net: vxlan: prevent NULL deref in vxlan_xmit_one Neither sock4 nor sock6 pointers are guaranteed to be non-NULL in vxlan_xmit_one, e.g. if the iface is brought down. This can lead to the following NULL dereference: BUG: kernel NULL pointer dereference, address: 0000000000000010 Oops: Oops: 0000 [#1] SMP NOPTI RIP: 0010:vxlan_xmit_one+0xbb3/0x1580 Call Trace: vxlan_xmit+0x429/0x610 dev_hard_start_xmit+0x55/0xa0 __dev_queue_xmit+0x6d0/0x7f0 ip_finish_output2+0x24b/0x590 ip_output+0x63/0x110 Mentioned commits changed the code path in vxlan_xmit_one and as a side effect the sock4/6 pointer validity checks in vxlan(6)_get_route were lost. Fix this by adding back checks. Since both commits being fixed were released in the same version (v6.7) and are strongly related, bundle the fixes in a single commit.",
    "evidence": "osv:CVE-2025-68353",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.114",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.2",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2025-68353",
      "aliases": [
        "CVE-2025-68353"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "6f19b2c136d98a84d79030b53e23d405edfdc783"
                },
                {
                  "fixed": "333deb6b43c11d5bce00463b364ac993d2fa02a6"
                },
                {
                  "fixed": "4ac26aafdc8c7271414e2e7c0b2cb266a26591bc"
                },
                {
                  "fixed": "1f73a56f986005f0bc64ed23873930e2ee4f5911"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-68353.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.114"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.2"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-68353.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:36.795099687Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1f73a56f986005f0bc64ed23873930e2ee4f5911",
        "https://git.kernel.org/stable/c/333deb6b43c11d5bce00463b364ac993d2fa02a6",
        "https://git.kernel.org/stable/c/4ac26aafdc8c7271414e2e7c0b2cb266a26591bc",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68353.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-68353",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68353.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-68353",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 504328,
  "published_at": "2025-12-24T10:32:44.068+00:00"
}